EPP2008-0001 BECKHOFF 8-Channel Digital Output EtherCAT P Box

Product Overview

The EPP2008-0001 (EPP 2008-0001) is a robust industrial I/O module designed for EtherCAT P systems, specifically engineered for direct machine mounting in decentralized environments. This "Box" module features 8 digital outputs, providing a highly reliable method for controlling actuators, valves, and indicators without the need for a protective control cabinet. By leveraging EtherCAT P technology, the EPP2008-0001 integrates high-speed communication and dual 24 V DC power supplies ($U_S$ and $U_P$) into a single, specialized M8 P-coded cable. With its IP67 protection rating and compact form factor, it is a preferred solution for modular machine construction, robotic end-effectors, and automated material handling systems where space is limited and environmental resistance is mandatory.

Technical Configuration

The EPP2008-0001 provides 8 digital outputs through M8 (3-pin, A-coded) sockets. Each channel is capable of switching up to 0.5 A, making it suitable for ohmic, inductive, and lamp loads. The module architecture ensures high system availability through individual short-circuit protection for each channel; if a fault occurs on one output, the remaining channels continue to operate unaffected. The EtherCAT P bus interface utilizes two M8 P-coded sockets (In and Out), allowing for efficient daisy-chaining of both data and power. Housed in a zinc die-cast or high-performance plastic enclosure, the module maintains 500 V electrical isolation and operates reliably in extreme temperatures ranging from -25 to +60 °C.

Technical Specifications

Technical FAQs

How does the EPP2008-0001 benefit from the EtherCAT P standard?

EtherCAT P combines the lightning-fast communication of EtherCAT with two 24 V DC power supplies ($U_S$ for electronics/sensors and $U_P$ for peripheral/actuators) into a single M8 cable. This eliminates the need for separate power cabling to the EPP2008-0001, drastically reducing installation time, weight, and potential points of failure in moving machine parts.

What happens if an output channel is short-circuited?

The EPP2008-0001 features intelligent electronic short-circuit protection. If a short circuit occurs, the current is limited (typically to 1.5 A), and the specific channel is deactivated to protect the internal circuitry. The fault status is reported back to the EtherCAT master, allowing for immediate software diagnostics.

Is there a specific orientation required for mounting?

No. Thanks to its fully encapsulated design and IP67 rating, the installation position is variable. It can be mounted directly on machine frames using the integrated mounting holes, provided that the M8 connectors are properly tightened to ensure their environmental seal.

Engineering & Installation Guide

EtherCAT P Network Design:

When daisy-chaining multiple boxes like the EPP2008-0001, it is critical to calculate the cumulative current draw from the $U_P$ (peripheral power) line. Since this module controls 8 outputs, a fully loaded box could draw up to 4 A from the $U_P$ supply. If the total current in the chain exceeds the rating of the P-coded cable or the voltage drops below 20.4 V DC, you must insert an EPP1322-0001 power feed module to refresh the supply.

M8 Output Wiring:

The outputs use 3-pin A-coded M8 connectors. Ensure that your actuator cables match this pinout. To maintain the IP67 protection rating, all M8 screw-type connectors should be tightened using a calibrated torque wrench (typically 0.4 Nm). Any unused M8 sockets must be sealed with a protective screw cap to prevent moisture and dust ingress.

Integration with TwinCAT:

In the TwinCAT System Manager, the EPP2008-0001 is added as an EtherCAT P device. The process image provides 8 individual output bits. For inductive loads, such as small solenoid valves, the module's internal protection circuitry handles the back-EMF, but for very high-frequency switching or high-energy inductive loads, verify that the breaking energy remains within acceptable limits to ensure long-term hardware reliability.